"Generally, since 2007, there have been significant advances in
forensic testing ... the clearest way to do this is with
scientific testing," Zellner said in her first TV interview since
taking the case. "Am I going to tell you exactly what it is? I am
not. But it's been a long time. There was a lot of evidence that
wasn't tested."

Zellner, an Illinois lawyer who specializes in wrongful
conviction cases, believes Avery is innocent of the 2005 murder
of Halbach.

Debates have been raging around Avery's conviction since
December, when Netflix released "Making a Murderer," a 10-episode series
following Avery and his then-teen nephew Brendan Dassey's trials
in the murder of Halbach. Its themes of police corruption and the
impact of wealth and media on the criminal justice system hit
home with many viewers.